Timing and reversing mechanism



Nov. 26,1929.

Filed OCC. 31, 1924 TIMING AND REVERSING MECHANISM 4 Sheets-'Sheet lNov. 26, 1929. J. c. HANNA 1,737,010

TIMING AND REVERSING MECHANISM Filed oct. 51, 1924 4 sheets-sheet 2 gif@ jfs! TIMING AND REVERSING MECHANISM Filed oct. 51, 1924 4sheets-sheet s @/z/v, CML/amm By MM 'KLM Nov. 26, 1929. .1.c. HANNATIMING AND REVERSING mEcHfxNIsM 4 Sheets-Shet 4' Fild 001;. 3l. 1.924

. WW MWNNI! Patented Nov. 26, 1F29 TIMING AND-REVERSIN G MECHANISMappncaaon mea october 31,1924. serial No. 746,952.

Thisinvention relates to improvements in timing Yand reversingmechanism, and has for its object to provide-a mechanism especiallyadaptedforfuse in conjunction with a rivet- .f5 ing-,or similar type ofmachine..

It-.iszfwell known-that in pressure riveting operations, especiallywhere the operator is paidon a piece-work basis, that the tendencyistoehurry the work and `allow insufficient time for the rivet to setunder therivetingpressure. In otherwords, the operator is inclined to-hurry the return stroke of the rivet-ing diebefore the rivet has hadsuflicient time to set. Thisresults in defective riveting andnecessitates calking to prevent leakagefalon-g the riveted joint.

vMy present-inventionv consists of a mechanism-Which will function tocontrol flow of actuating-fluidlto the riveting or othermachine 'withwhichthe mechanism is used in such wise ythat upon depression of theoperating lever the machine will commence its rivetingorzworkingstroke;vAs soon as resistance to -this'strokehascaused the pressure of thevactuatingfluid in the cylinder to build up to a desired point, thisbuilt up pressure istransmitted. to my timing mechanism, andcontrolofthe machine forl the balance of its cycle is removed from. theoperatorto the mechanism. y The lattermay be set to permit a certaintime-to elapse after the riveting or other operation is initiatedbefore-the working tool iszreturned to initial positiony ready forrepetition :ofits cycle of operations.

Other yobjects residein the details offmy mechanism 'and-the operative.connection to the working machina These objects will be more fully`describedin the following specifi- 40 cation and shown in theaccompanying drawings, -in which Fig. 1 isa vertical section alonglline1-1 of Fig..2.

Fig.V 2 is a similar section `taken at right angles to the section ofFig..1.

Fig. 3 isV a .vertical section along the line Of l.'

Fig.,4 is a diagrammatic view illustrating` the -adaptation of mymechanism to a riveter, the jaws and sides thereof being drawn to alarger scale than the balance ofthe illustrated apparatus.

Like Vnumerals refer to vthe same elements. throughout the drawings. boxor casing havingthe base. portions 10a 10 designates a' and thesupporting feet V101? apertured for insertion of fastening bolts or thelike tosecure the casing to the oor or foundation. A upporting frame,generally indicated by numeral 11, extends into the casing 10, beingsupported by its flanges 11L which are bolted to the side wallsof casing10 and form a coverv therefor.

Thisframe is provided with the spaced MWalls 11'b and 11C, between'which' eX- tends theconnecting portion 11d (see Fig. 2). Atthebottonrthe walls 11b and .11c are connected by the base yplate 11:0,which is extended at one side to form a supporting base for an electricmotor, generally indicated my nll- tions 14d mounted lin the seats ofsupporting lugs` 13 .described above..

This head 14c is provided withthe angular duct 14e which connects at.loney end withthe .interiorof a metallic..cylindrical bellows'member 16and at :the other end with the fluid supply duct 17, whichextendsfupwardly through the casing, asshown inFig. 4 for example. Thistubel? iseither constructed ofsuficientrflexibility,orhas:a kflexiblesection interposed to accommodate the rocking motion ,ofthe telescopic'tube .14 on'its `trunnions 144.

At its upper endthe member-'16 is provided with a head1@L threaded intoengagement `with the `lower end of inner tube 14a.

The latter is slotted near its lower portion as indicated bynume1'al'14f, and a `pin 18 extends through said slot, being anchored atits ends in the outer tube 14".

Slots `14f.y permit relative movementof the inner tube 14a withy respectto the outertube r14".

Extending across the tube 14" at the upper end thereof is the fixed pin19, and between pins 18 and 19 extends a coiled spring 21 undercompression. At the upper end of tube 14a is provided a head 14gthreaded thereto, this head being provided with the spaced upwardlyextending lugs 14 between which extends the shaft 23 carrying the roller24 and ball bearings and container 25 mounted upon the shaft 23 betweenthe lugs 14h (see Figs. 1 and 2). Projecting outwardly and downwardlyfrom the head 14g are the fingers 14k, having the angularly disposedlugs 14l at their lower extremities, as shown in the drawings.Projecting downwardly from the lower head 14c is the apertured boss 14m,through which is inserted the laterally projecting pin 25 carried by thethreaded stud 26 and threaded into suitable aperture in the small lug11X extending upwardly from base flange 11e (see Fig. 2 for example).The stud 26 is larger in diameter than the pin 25 and the shoulder isformed in this manner, against which abuts the disc 28 shouldered toform a seat for one end of the coiled compression spring 30, the otherend of which engages the sliding plug 31 on the pin 25, this plug beingslidable on the pin and also shouldered for accommodation of the coiledspring 30. This plug' presses against its boss 14m. The force extertedagainst this boss may be varied by adjusting the position of the stud26, which is provided with the slot 26"L in one end for engagement by ascrew driver or the like for locking in adjusted position by the locknut 32. Mounted upon the top of the cover flange 11 is the auxiliarycasing 435, having the side walls 36, through and between which extendsthe bolt 37. At one end the casing 35 is slotted at 353L to accommodatethe operating handle 46, which is pivoted intermediate its extremitiesupon the bolt 37. This operating handle 40 is bifurcated to form thespaced arms 40a, the outer end of one of which is provided with theinwardly directed lug 401 (see Fig. 2). Located between the arms 40n area pair of spaced guide plates 42, between which is secured a cam plate43 by the bolts 44 or the like. This cam plate 43 is provided with adouble curve, one portion 43a of which is contacted by the roller 24during the riveting stroke, the other portion illustrated in dottedlines in Fig. 2 and designated by numeral 43h, is acted upon by suchroller to reverse the control of the machine. The guide plates 42 andcam plate 43 are also pivoted upon the bolt 37. The cam plate 43 isprovided with the spaced sockets 42c in 'the upper portion thereof. Ineach of these sockets is seated one rounded end of a link 45, theselinks being pivoted at their other ends to the lower extremity ofcut-off valve 46. It will be apparent that by this construction, uponeither direction of movement of the operating handle 40 about the bolt37, one of the links 45 will be raised and the valve 46 lifted from itsseat thereby.

The guide plates 42 are extended laterally,

as indicated by numeral 42d, and betweenv (see F ig. 2). The lug 40b onthe extended end of operating handle 40 underlies one of these plateextensions 42d, and has secured to it at 40X one end of the cord 51. Atthe other end of the cord is secured the weight 53. At one side of oneof the plate extensions 42c1 is secured a stud 56, around which is bentone end n of a clutch operating rod 60. At its lower end rod 60 isprovided with the lock nuts 62 threaded thereon. A coiled spring 63extends upwardly from such lock nuts, and a collar 64 is mountedthereabove to sli-de on rod 60. Spaced from the spring and locatedthereabove is the clip 65'split and bolted in adjusted position to therod by the bolt and nut 66.

On the shaft of motor 12 is secured a sheave or pulley 63, around whichis mounted the belt 69 also running around the drive pulley 7 O, whichis carried upon shaft 71. To this shaft is secured a worm 71a meshingwith the worm gear ring 73. This ring is frictionally held against theouter clutch of the gear disc 75 by means of spring portions 7 6a of asecond disc 76. This construction permits slipping of the gear ring 7 3should the mechanism driven thereby encounter an unusual resistance.

The gear disc 7 5 is rotatably mounted upon the shaft 80, and isprovided at its hub portions 7 5a with clutch teeth 7 5b. Splined to andslidable upon the shaft is a clutch 82 grooved at 82a to accommodate theends of shifter fork 83. Extending downwardly and outwardly from one ofthe lugs 7 2 is the arm 85, at the lower end of which is ournaled therod 86, to which is secured the clutch shifter 83 adjacent one end.`Adjacent the other end is the actuating arm 87 likewise secured to suchrod and provided with the angularly disposed finger 87a (see Figs. 1 and3), this finger being apertured to permit insertion therethrough of theclutch rod 60, this linger 87 being contactable by the spring washer 64or the clip 65, depending upon the direction of movement of the rod. Itwill thus be apparent that the rod 60 may be actuated to shift theclutch 82 into or out of mesh with the clutch teeth 75b of worm geardisc 75. At its other end the rod 80 is provided with a pinion 90secured thereto, this pinion meshing with the gear 91, having on itsouter rim a plurality of holes 91a spaced at calculated intervals. Thisgear 91 is rotatably mounted upon the shaft 92 journaled in bosses 11yof walls 11b and 11". To one end of the shaft 92 iso to which securedone end or the coiled spri* the other end thereof being anchored to theside wall 11b, this spring being constructed oi tempered metalfunctioning in a manner similar to that oi' a clock spring. il pairspaced striker arms 100 are secured to the. shatt 92, these arms beinglocated and arranged to strike the fingers 141 in their orbit of travel.

lt will be apparent that when the shaft is clutched to gear .75, thepinion will rotate gear 91 against the action of spring 98 which will bewound up. rllhe rotation of gear 91 is in turn transmitted to shaft andthus to the striker arms 100, which will be rotated until they strikethe fingers 141. The de-clutching ot the shaft 30 after such movenientwill result in the gear 91 being returned to normal position by thecoiled spring 98. A lug 11 projects trom the wall 11b from the casi-ngand is provided with a pin 101 entendi therethrough, having the head 101at one end (see Fig. 2). A collar or washer 102 of rubber or `otherresilient material is interposed between the head 101a and he lug 117'.Projecting from one spoke of `he gear 91 is the projecting lug 91X,which will contact with the cushion head 101EL of pin 101 to determinethe normal or rest position of gear 91.

Extending upwardly from the casing is the valve bleek 120 in which areprovided the valve chambers 121 and 122. ln the former is provided aseat 121a upon which normally seats the soft collar 123b carried on thevalve 123 ln the upper portion ot the chfilnber 121 is irovided a coiledcompression spring 125 extending between the end of the chamber and thesliding cap 123C secured to the valve 123 by the nut 123 threaded on athreaded extension 123d of valve 123. This cap 123C thus serves tomaintain the sott collar 123b clamped to the valve stem 123 againstenlarged flange 123e thereof, and aets as a guide for the valve. rlhisvalve is normally maintained in closed position by the con pression of s)rin 125. A washer 126"1 of leather or the like is provided to co-aetwith 'tie `cap 123C to prevent leakage of operating fluid. An opel`-ating fluid supply pipe 130 leads to the valve chamber 121, whiletherefron'i leads the duct 121t to the secon d valve chamber 122, inwhich mountet the balanced piston valve 131 of lconventionalconstruction having the exhaust elbow 131a. From the valve chamber 122lead the ducts 133 and 1347 the former being arranged to supplyactuating luid tor. the riveting stroke for example, the lattersupplying actuating fluidfor the exhaust stroke, these ducts alsoserving for exhaust from the respective ends of the cylinder. Extendingdownwardly from the lower end oi valve 131 and pivotally attachedthereto is the link138 pivoted at its other end on the bolt 139yentending between the guide plates 42. By this construction pivotalmovement oft the operating handle 40 in one direction will function tosupply actuating fluid to one end of the machine cylinder permittingexhaust from the other end, and movement ofthe operating handle in theopposite direction willreverse these flows.

Projecting downwardly from the top of casing 35 are the stop studs 140,limitingy the pivotal movement of the operating handle 40 in eachdirection.

In Fig. 4 l have designated the machine cylinder by the numeral 145, thesame being provided with an actuating fluid chest to which the fluid issuppliedfrom the valve chamber. indicates the movable die carried by thedie plunger 151, while therebeneath is located the stationary die 152.19rd jecting outwardly from the upper end of plunger 151 and movabletherewith is the plate 154 apertured to accommodate the rod 155 which isprovided with the head 155a at its upper end. This rod 155 isslidablyeztM tended through'a second Xed*` plate 156, projectingoutwardly from the fixed jaw 158 of the machine. Atits lower end the rod155 carries the link 155b to which is attached the end of Bowden wire160, which is reci procable in a flexible tube 161 of well kknownconstruetion. One end of this tube is anchored in the bracket 163 andthe other endis carrier, to and secured to the cover flange 11a see Fi2). The corresponding end of Bowden wire is provided with a securingbutton 160 attached to the operating handle 40.

It will be apparent with this construction that when the mechanism is inthe position shown in `Fig. 4, for example, with the plunger 151 and die150 retracted from riveting position that the operating handle 4() maybe depressed without interference from the Bowden wire cont-rol, as thestem 155 will rise vei tieally with respect to plate 154. Lift of handle40, however, is prevented by the head 155a on stein 155, so that thecontrol valve may not be moved to reverse position which would result inwaste of air. When the die has coinpleted a riveting stroke, the slidingengagement of plate 154 with stem 155 will permit relative movementwithout affecting the position of the wire 160. As will be explainedlater. the operating` handle is moved to reverse position or upwardlyfrom normal position on the return stroke, and is returned to normalposition shown in Figs. 2 and 4, for er:- ample, b y the upward movementof the plunger 151 and plate 154, thus bringing the delay and timingmechanism to neutral position. Check valves 133a and 134a are insertedin the respective pipes 133 and 134 and 1try-pass pipes 133h and 134bextend therearound respectively. In these by-pass pipes are provided thereversely actuating check valves 133C and 134c respectively to permitby-pass and exhaust ot air from that end of the cylinder to which theactuating fluid is not being admitted. The purpose of this by-pass andcheclrvalvc construct-ion is to permit flow of actuating -tluid in onedirection through the main pipe, the check valve 133a or 134a opening topermit such flow, and the check valve 133C or 134C closing to preventflow through the by-passes. Reverse flow in either line is preventedthrough the main pipe by the check valves 133L and 134i1 closing andforcing the flow through the by-pass pipes, the check valves 133C and134C therein opening to permit such flow. By this means I am enabled toregulate the flow in the two directions in each line by properlyselecting or adjusting the orifice in the check valves. For instance,iiow through the check valves 133a or 134-"L may he actuating flow ofthe tluid under pressure which may be relatively restricted, while flowthrough either of the by-passes will be eirhaust flow and will berelatively unrestricted to permit tree exhaust.

Secured by bolts 200 or the like to the side wall 11c of the frame istheA oil trough'201 (see Figs. 1 and 3, for example), through whichrotates the worm gear 73, the same being thereby constantly lubricated.

Depending from the cover flange 11L is an oil reservoir 20.3, from whichlead a plurality of lubricating pipes 204 to the various bearings andother elements requiring constant lubrication. A cover 205 is providedfor this reservoir to permit refilling from time to time as required.

In the operation of the machine, assuming the pipe to be att-ached to asource ot actuating Huid under pressure and the parts in normalposition, as illustrated in the drawings, the operation is as follows:The operator depresses the operating handle 40 whereby the same ispivoted about the bolt 37. A litt will be thereby exerted upon theeXtension 421 of guide plate 42 through the linger 40b,which will resultin a partial rocking of the guide plates and cam plate 43 about the bolt37. A litt will be thereb imparted by the right hand link 45 as viewedin Fig. 2 to the valve stem 123, thereby permitting iiow of tluid underpressure to the valve chamber 122 through duct 121f. rl`his samemovement of the guide plates 42 lifts the control valve 131 through themedium of link 138 to position in which actuating luid will `flowthrough duct 133 to the machine cylinder to eil'ect the working strokeof the riveting die 150. The same movement of valve 131 opens the duct134 to the atmosphere through elbow 131L and permits exhaust from theopposite end of cylinder 145. The rocking oi' the cam plate 43 altersthe relation ot the arcuate surface 43l with respect to the roller 24,and the coil spring 30 acting on the lower end oi the telescopicexpansible member 14 swings the same around its trunnions 14d to a righthand position from that viewed in Fig. 2. The compression o spring 21serves to maintain the roller 24 in contact with the cam during thismovement. As the piston in cylinder 145 moves from the right hand end ofsuch cylinder on operative stroke, the pressure in member 16 will not beappreciably raised due to the angle of the connection of supply pipe 17to pipe 133, as shown in Fig. 4. As the die encounters resistance fromthe rivet, tor example, the pressure in cylinder 145 will build up, andsuch pressure is transmitted baci; through pipe 17 to the member 16,which expands and in etliect locks the cam and roller in i'` 1it handposition as soon as the pressure .n the member is suiiicient to overcomethe downward pull of weight 53 acting on the extension 42d of guideplate 42. As eX- plained above, this movement or' the operating handleorlever 40 is not interfered with by Bowden wire 160 owing to the slidingengagement of stem with plate 154. is soon as the pressure in member 16has built up to a predetermined point, as for example 55 pounds which Ifind suilicient for use with a line pressure ot 100 pounds to the squareinch, the operating handle 40 may be released as movement upwardlythereby will not aiiect the position of cam 43 due to the locking orresistance by the telescopic member 14 just described. It will beappreciated that the time required for the pressure in the sylphon tobuild up to this point is very slight, but this construction andarrangement permits the operator to re 7erse the riveting die 150 shouldhe so desire before the die encounters resistance, but the resistancebuilds up so rapidly after the rivet is contacted by the die as toalmost immediately lock the cam and roller in their right hand position.

The electric motor 12 is running constantly at a comparatively high rateof speed, and during the non-operation ot the mechanism the rotationwhich is transmitted to the large pulley 70 is of no el'lec't, as suchrotation is transmitted through shaft 71 and worm 71n to gear 73 whichwill rotate on and relative to sha-tt 80. TWhen the operating handle 40is depressed, however, the upward movement o'l' the right hand end o't"guide plate 42 is transmitted through clutch rod GO and the springcollar 64 is brought into contact with lug 87 at the end of leiin) toreciprocate the same, a control mechanism comprising a valve to controlflow of such actuating fluid, operating means operatively associatedtherewith and manually movable to move said valve to position to effectriveting stroke of said die, and mechanism controlled by said operatingmeans to effect reversal of said valve and thereby said fluid actuatedmeans and said die after a desired period of time.

2. In combination, a riveter comprising a reciprocating die, a fluidactuated means to reciprocate the same, a control mechanism comprising avalve to control flow of such actuating fluid, operating meansoperatively associated therewith and manually movable to move said valveto position to effect riveting stroke of said die, mechanism controlledby said operating means to effect reversal of said valve and therebysaid fluid actuated means and said die after a desired period of time,and means associated with said riveter to return said operating means tonormal position upon completion of said die reversal.

3. In combination, a riveter comprising a reciprocating die, a fluidactuated means to reciprocate the same, a control mechanism comprising avalve to control flow of such actuating fluid, a lever and a camoperatively associated therewith and manually movable to move said valveto position to effect riveting stroke of said die, and mechanismcontrolled by said lever and cam to lock for a period of time andthereafter reverse said valve and lever and cam and there-- by saidfluid actuated means and said die.

4. In combination, a riveter comprising a reciprocating die, a fluidactuated means to reciprocate the same, a control mechanism comprising avalve to control flow of such actuating fluid, operating meansoperatively associated therewith and manually movable to move said valveto position to effect riveting stroke of said die, mecha- 'nismcontrolled by said operating means to effect reversal of said valve andthereby said fluid actuated means and said die after a desired period oftime, and means associated with said riveter to return said operatingmeans to normal position upon completion of said die reversal, said lastnamed means comprising a Bowden wire and casing.

5. In combination, a riveter comprising a reciprocating die, a fluidactuated means to reciprocate the same, a control mechanism comprising avalve to control flow of such actuating fluid, a lever and camoperatively associated therewith and manually movable to'move said valveto position to eflect'riveting stroke of said die, mechanism actuated bysaid lever and cam to effect reversal of said valve and thereby saidfluid actuated means and said die after a desired period of time, andmeans associated with said riveter to return said lever and cam tonormal position upon completion of said die reversal, said last namedmeans comprising a Bowden wire and casing, said wire being operativelyconnected to said die.

6. In combination, a riveter comprising a reciprocating die, a fluidactuated means to reciprocate the same, a control mechanism comprising avalve to control flow of such actuating fluid, operating meansoperatively associated therewith and manually movable to move said valveto position to effect riveting stroke of said die, mechanism controlledby said operating means to effect reversal of said valve and therebysaid fluid actuated means and said die after a desired period of time,and means associated with said riveter to return said operating means tonormal position upon completion of said die reversal, said last namedmeans comprising a Bodwen wire and casing, said wire being provided witha stem member, an apertured plate operatively attached to said die, saidstem being headed and slidable in the aperture of said plate, the headof said stem being engageable by said plate adjacent one limit oftravel.

7. In combination, a chambered valve body and riveting cylinder, a ductto supply actuating fluid to one end of said cylinder, a second duct tosupply actuating fluid to the other end thereof, said ducts leading fromthe chamber in said valve body, a valve operable to throw either of saidducts into communication with a source of supply or an exhaust passageor to close both said ducts when in normal position, a third ductattached to said first duct at an angle thereto, operating means anddelay mechanism comprising a locking member actuatable by fluid fromsaid third duct to lock said operating means in operating position for adesired period of time.

8. In combination, a main cut off valve and a control valve, means tosupply actuating fluid to said control valve upon opening of said cutoff valve, operating means comprising a manually operable member and acoacting actuating member, said co-acting member being actuatable in onedirection on movement of said manually operable member in acorresponding direction, said co-acting member being operativelyattached to said control valve to move the same simultaneouslytherewith, said co-acting member being also operatively attached to saidcut ofi valve to move it to open position on movement in eitherdirection, means to normally maintain said operable member and saidco-acting member in operative adjustment, means operable to lock saidco-acting member after movement by said manually operable member for adesired period of time.

9. In combination, a main cut off valve and a control valve, ymeans tosupply actiuuamgV a correspondingdirection, said co-acti member being`operatively attached to said controlvalve to` move the samesimultaneouslyv therewith, said co-acting ber being also operativelyattached to said cut oil valve to move it to open position on moif'ementin either direction, means to normally maintain said operable member andsaid co-aeting member in operative adjustment, means operable by fluidpressure after movement of said control valve to one position to loclr`said co-acting member against movement by said manually operable member.

i0. In combination, a cut oli valve and a. control valve, means tosupply actuating fluid to said control valve upon openingr oi said cutoil valve, operating means comprising` a manually operable member and acio-actingl actuating member, said co-actim; member being' actuatable inone direction on movement of said manually operable member in acorresponding direction, said co-acting member being` operativelyattached to said control valve to move the same simultaneouslytherewith, said eo-acting member beine; also operatively attached tosaid cut oil' valve to move it to open position on movement in eitherdirection, means to normally maintain said opera-ble member and saidco-actinp, member in operative adjustment, means operable to lock saideo-acting member after movement by said manually operable member, meansto Withdraw said locking means from locking relation after a desiredperiod of time.

ll. In combination, a main out oil valve and a control valve, means tosupply actuating fluid to said control valve upon opening of said cutott valve, operating means comprisinga manually operable member and aco-actingr actuating member, said co-acting` member beingl actuatable inone direction on movementof said manually operable member in acorresponding direction, said eo-actinp;

member beingl operatively attached to said control valve to move thesame simultaneously therewith, said co-acting` member being` alsooperatively attached. to said cut oil valve to move it to open positionon movement in either dir ction, means to normally maintain saidoperable member and said co-aoting member in operative relation, meansoperable by fluid pressure after movement of said control valve to oneposition to lock said co-acting;` member gainst movement by saidmanually operable member, means to Withdraw said locmng means fromlocking relation.

i2. In combination, a main cut'otfvalve and control valve, means tosupply actuatli id to said control valve upon opening et said out oil1valve, operating means comprising a manually operable member and ac'o-actin'g` actuating member, said eo-aoting member being aetuatable inone direction on movement oit said manually operable member in acorresponding` direction, said co-aoting member being,` operativelyattached to said control valve to move the same simultaneouslytherewith, said co-acting member being also operatively attached tosaid'cut on valve to move it to open position on movement in eitherdirection., means to nor nally maintain said operable member and saidco-acting member in operative adjustment, means operable by iluidpressure after movement of said control valve to one position to locksaid co-acting .member against movement by said manually operablemember, means to Withdraw said locking means 'from looking relation,said maintaining` means being operable after said Withdrawal to actuatesaid operating means to reverse the position of said control valve.

13. ln combination,- a control valve, an-foperating lever, a Cain membermovable with said lever, an expansible member incontact with said cammember, means to swing said expansible member on movement of said-'cammember in one direction from normalor rest position to positionmaintaining said cam and thereby said valve in open valve position.

` le. ln combination, a control valve,'-an operating lever, a-cam membermovable With said lever, said operating member being provided With meansto move said cam member in one direction of travel, an expansible.member in Contact with said cam member, means to svvinp; said expansiblememberon movement of said cam member in one direction from normal orrest position to position maintaining said cam and thereby said-valve inopen valve position.

15. In combination, a controlvalve, anoperating lever, a cam levermovable with said lever, an expansible member in contact With said cammember, means to swing' said expansible member on movement' of said cammember in one direction, from normaler rest position to positionmaintaining saidcam and thereby said valve inlopen valve position, abellows member associated With said eXpansible member to be expanded andmaintain said cam member in said open position, said valve beingaotuatable by said cam member.

16. In combination, a control valve,-an operating lever, a cam levermovable with said lever, an eXpansible member in contact with said cammember, means-to swing saideX- pansible member on movement oisaid cammember in one direction from'normalor-re'st position to positionmaintaining said vcam and thereby said valve in open valve position,means co-acting with said expansible member to lock said cam member' insaid open position, said valve being` actuatable by said cam member.

17. In combination, a control valve, an operating lever, a cam leverassociated therewith, an expansible member in contact with said cammember, means to swing said ei;- pansible member on movement ot said cammember in one direction, means co-acting with said expansible member toloclr said cam member in said position at one limit of travel, saidvalve being actuatable by said cam member, a delay mechanism comprisingmeans to engage and return said enpansible member to normal position.

18. ln combination, a control valve, an operating lever, a cam leverassociated therewith, an expansible member in contact with said cammember, means to swing said expansible member on movement of said cammember in one direction, means co-acting with said expansible member tolock said cam member in said position at one limit olf travel, saidvalve being actuatable by said cam member, a delay mechanism comprisingmeans to engage and return said ezzpansible member to normal position,and electrically actuated means to actuate last named means.

19. In combination, a control valve, an operating lever, a cam leverassociated therewith, an expansible member in Contact with said cammember, means to swing said ei;- pansible member on movement of said cam member in one direction, means co-actmg with said ezrpansible memberto loch said cam member in said position at one limit oi: travel, saidvalve being actuatable by said cam member, a delay mechanism comprisingmeans to engage and return said enpansible member to normal position, anelectrically actuated means to actuate saidV last named means, meansactuatable on movement ot said cam member in said direction of travel tothrow said electrically actuated means into operation.

20. ln combination, a control valve, an operating lever, a cam leverassociated therewith, an eXpansible member in contactwith said cammember, means to swing said enpansible member on movement of said cammember in one direction, means cio-acting with said expansible member tolock said cam member in said position at one limit of travel, said valvebeing actuatable by said cam member, a delay mechanism comprising meansto engage and return said enpansibie member to normal position, anelectrically actuated means to actuate said last named means. meansactuatable on movement o'lE said cam member in said direction el travelto throw said electrically actuated means intooperation, means resistingmovement or" said cam member from normal position.

21. ln combination, a control valve, an operating lever, a cam leverassociated therewith, an expansible member in contact with said cammember, means to swing said eX- pansible member on movement of said cammember in one direction, means co-acting with said expansible member tolock said cam member in said position at one limit of travel, said valvebeing actuatable by said cam member, a delay mechanism comprising meansto engage and return said eXpansible member to normal position, anelectrically actuated means to actuate said last named means, meansactua-table on movement of said cam member in said direction ot travelto throw said electrically actuated means into operation, meansresisting movement of said cam member from normal position and normallymaintaining said operable member in operable engagement therewith.

Q2. ln combination, an operating lever, a cam member movable in onedirection by said operating lever, said cam being provided with a curvedconcaved contact surface, the curve thereof comprising arcs joined at aneutral point, a roller contacting therewith, means to shitt said rolleron said cam surface from said neutral point upon movement of said bysaid operating lever, said means beoperable to hold said cam through thencdium of said roller in shifted p-osition.

ln combination, an operating lever, a cam member movable in onedirection by said operating lever, said cam being provided with a curvedconcaved Contact surface, the curve thereof comprising arcs joined aneutral point, a roller contacting there- `Yith, means to shit't saidroller on said cam surface trom said neutral point upon movement of saidcam by said operating lever, means co-acting with said roller to locksaid cam in one position after movement ot said cam and roller.

2li. ln combination, an operating lever, a cam member movable in onedirection by said operating lever, said cam being provided with a curvedconcaved contact surface, the curve thereof comprising arcs joined at aneutral point, a roller contacting therewith, means to shift said rolleron said cam sui-tace from said neutral point upon movement of said camby said operating lever, means co-acting with said roller to lock saidcam in one position alter movement of said cam and roller, said lastnamed means comprising a iluid actuated member.

25. In combination, an operating lever, a cam movable in one directionthereby, provided with a curved concaved contact surtace, said surfacebeing formed of a pair of arcs oined at a neutral point, a rollercontactable with said surface, an eXpansible member carrying saidroller, said member being mounted to swing about an axis, the

curves of said cam normally diverging inwardly from the orbit of saidroller to resist movement from neutral thereof.

26. In combination, an operating lever, a cam movable in one directionthereby, provided with a curved concaved Contact surface, s sui-facebeing 1to1-med ol? pair of arcs joined at a neutral point, a rollerlcontactable with said surface, an expansible member carrying' saidroller, said member being` mounted to swing about an axis, the curves ofsaid cam norniially diverging inwardly from the orbit ot said roller toresist movement 'from neutral thereof, means coacting` with said leverand cam to resist movement of the latter by the former.

2T. in eombinatfon, an operating lever, a cam movable in one directionthereby, provided with a curved concaved Contact surface, sait` surfacebeing formed of a pair ot arcs joined at a neutral point, a rollercontactable with said surface, an expansible member carrying` saidroller, said member being mounted to swing about an axis, the curves oi?said cam normally diverging inwardly 'from the orbit of said roller toresist movement from neutral thereof, means co-acting with said leverand cam to resist movement el? the latier by the former, said meansbeing' also constructed and arranged to maintain said cam in operativerelation to said lever.

28. ln combination, an operating lever, a cam movable in one directionthereby, provided with a curved concavcd Contact surface, said surfacebeing,` formed oiC a pair oit arcs join d at a. neutral point, a rollercontactable 'nl i said surface, an efipansible member carrying` saidroller, said member being niountcd to swing, about an axis, the curvesot said cam normally diverging inwardly from the orbit or said roller toresist movement trom neutral thereof, means co-acting with said leverand cam to resist movement of the latter by the former, said meansbeing,` also constructed and arranged to maintain said cam in operativerelation to said lever, said means being,` also constructed and arrangedto resist movement or" said roller and expansible member from neutralposition in one direction.

29. ln combination, an actuating` member, a manually operable memberco-acting therewith to move the same to an operating position., means tolock said actuating member in such position, means to withdraw saidlocking` means from locking position, said last named means comprising awithdrawing member, an electric motor, and means to transmit rotationfrom said motor to said withdrawing` member, means actuatedsimultaneously with the movement of said operating member to throw saidmotor into operative relation with said withdrawing member.

.30. In combination, an actuating member,

manually operable member co-actingtherewith to move the same lt0operating position, locking means to lock said member in such position,means to Withdraw s aid'lOkng from locking relation, said last ne inedmeans comprising .a withdrawal -memn, an elet motor, means to transmitrotation `of said motor .to said withdrawal member, said last namedmeans comprising? clutching` means movable into driving rel-ation uponmovement of said actuating memmanually operable actuating` means, meansto lock said lirst named means in one position, means to withdraw saidlocking means from locking` relation, said last named means comprising adelay mechanism, said delay mechanism comprising a rotatable arm, a gearrotatable therewith, means associated with said lgear to normally returnthe same to a rest position, a stop, and stop means carried by said gearto contact said stop at rest position.

33. In combination with a riveter comprising aA reciprocating` die andiuid actuated means to move said die to and from riveting position, acontrol valve, a manually operable member operatively attached to saidvalve and movable to open and close the same, means to automaticallylock said member in open valve position, means to release said locking'means after a desired period ot time, the actuation of said lockingmeans being` initiated by movement of said member, and means to returnsaid member and valve to closed valve position after release of saidlocking means.

34. In combination with a riveter comprising` a reciprocating die andfluid actuated means to move said die to and from riveting posit-i on, acontrol valve, a manually operable lever having a cam surface andoperatively attached to said valve to move the same to and trom openposition, means to automatically lool: said member in open valveposition including` an eXpansible member pivotally mounted andcontacting with said cam surtace, means to release said locking memberafter a desired period of time, and means to return said member andvalve to closed valve position after such release.

ln combination with a riveter comprising a reciprocating die and fluidactuated means to move said die to and from riveting position, a controlvalve, a manually operable lever having a cam surface and operativelyattached to said valve to move the same to and from open position, meansto automatically lock said member in open valve position including aneXpansible member pivotally mounted and contacting with said camsurface, other means to supply eX- tending fluid pressure to said memberupon opening of said valve whereby the said member will move along saidcam surface and lock said lever in open valve position, means to releasesaid locking member after a desired 15 period of time, and means toreturn said member and valve to closed valve position after suchrelease.

In Witness whereof, I hereunto subscribe my name to this specification.

,2 0 JOHN o. HANNA.v

